Wrench



Nav. 29, 1927. 165l,l62

G, M. SMITH WRENCH Filed NOV- 13. 1926 2 Sheets-Sheet l Nov. 29, 1927.

. 1,651,162 G. M. SMITH WRENCH Filed NOV- 13. 1926 2 Sheets-Sheet 2 @wwwPatented Novi` 1927s UNITED STATES 'GAERETT M. SMI'IH 0F FORT VJORTH,TEXAS.'

WRENCH.

Application filed November This invention relates to improvements inwrenches ot the parallel jaws type in whichr one of thejaws is carriedby a main stock Y and the other .jaw carried'by an auxiliary stock, thetivo jaws being'inaintained in parallclrelation byparallel linkspivotally connecting the auxiliary stock with a sleeve adjustable .onthe main stock. The object ot the invention is 'to provide means torholding the sleeve in rits adjustments on the main stock, said meansbeing easily yoperated and permitting a quick adjustment of the jaws tomeet the requirements.

The invention consists in the novel con struction, combination andarrangement oiE parts, hereinafter described, pointed out in theappended claim, and illustrated by the accompanying drawings. 'Y

In the accompanying drawings, in which similar reference charactersdesignate corre-V sponding parts:

Fig. 1 is a plan view of a wrench embodying the invention,

Fig. 2 is a side elevation,

Fig. 3 is a detail view showing the main stock, y Y

Fig. 4 is a view partly in plan and partly in longitudinal section, andY Figs. 5, 6 and 7 are sectional views on the lines 55, 6 6 and 7 7,respectively, of Fig. 1.

Referring to the drawings in detail, 10 designates the main stock ot theimplement with one end shaped toiorm a handle 11. On the other end ofthe stock is formed the jaw `12 with the claw 13 seated on its face.Slidable on the main stock is the sleeve 14, the stock and sleeve being`rectangular in cross-section, as to their meeting faces, so that thesleeve cannot turn on the stock. Pivoted to the outer side ot' thesleeve are ends ot the tour links 15, the other ends oi these links arepivoted to the auxiliary stock 16 carrying the other jaw 17 of theimplement. rEhe sleeve, links and auxiliaryy stock are so proportionedand connected as to form a jointed parallelogram.

Each pair of links is hinged at one. end to the sleeve by a pin 18passing through the ends oi' the links and the boss 19 on the outer sideof the casing; the other end of each pair of links is hinged totheauxiliary stockby the pin 20 passing through theends of the links andthe body of thev auxiliary 13, 1926. Serial No. 148,194.

stock.. vEach pin 2O is held in place by a head at one end and a Cotterpin passing through the other end. The hinged parallelogram 'Formationof vthe parts comprising the auxiliary stock, the links, and the sleeveslidable on the main stock serves to niaintain the faces of the opposingjaws in parallel relation irrespective oi: the movement of the sleeveonV the main stock, The rearward movement oi' the auxiliary stock withrelation `to. the sleeve is limited by the rear pair oi' links striking'the abutinents 21 extending from the opposite sides.

The sleeve 14 is provided with means for holding it in its adjustmentson the main stock. In vthe forwardend of the outer side of the sleeve isan opening in which is seated the nipple 22. Guided in this nipple isthe bolt 23 adapted to engage the sockets 24 formed in the outer side ofthe main stock. At an intermediate part the forward boss 1S) istransversely recessed and extending through vthe recess is the lever 25pivoteo on the pin 18 passing through the boss. The forward end of thelever extends through the side of the nipple 22 and is forked to engagethe neck or reduced part of the bolt 23. Between the rear end of thelever and the sleeve is interposed the coiled spring 26 undercompression that normally tends to press the rear end of the leveroutwardly. Consequently, the front end of the lever normally tends to-press the bolt 23 inwardly to engage any of the sockets 24 that may bein register with the bore of the nipple. The inner end kof the coil isseated in a socket in the wall ofthe sleeve and the other end is engagedby a lug on the underside of the lover, the spring being held againstaccidenetal displacement. The outer face of the rear end of the lever isshaped to torni a tingen piece so that the lever can be readilydepressed to raise the bolt from engagement with a socket. By adjustingthe sleeve on. the main stock the opening between the jaws can beregulated to meet the requirements oi' the work.

The claw plates 13 on the face of the jaws 12 and 17 havetheirrespective teeth 'extending in opposite directions to meet therequirementsoi the implement used as a pipe Wrench. Theiplate on theclaw 12 has its teethprojecting forward tof engage the pipe "1Q and'atthe outererid of jaw 17, extends 'air abutnentf) engaging a'reces'sedend 'of the claw plate to hold the plateraga'instf the'Y thrust fofythe"vvo`1"l{. Each plate is held in vplace-by a screw `30passingthroughY` the'fjaw into the claw plate. 'To' facilitate the attachnientand removal of the claw plates, ja screw-driver Blis' provided thaty isparticularly shaped to'it the s'crewhead andvvhen" on the forward thrustot the main stock, While the teeth of the plate on the jaw 17 projectrearward to engage thejpi'pe sduring the pull-of the aiiXiliary'stocklduring` a' pipeturning operation. The clavv platesv aredetachably inountedon the aWs so that they can he replaced when they4become Worn.

In the face of each jaw is a longitudinal' re-f" cess 27 into which fitsa longitudinal projection 28 on the backof the saidfplatef-Acrss the`tace of each jaw, at the inner V end of jaw not 'in'nse is turnedinto'ithe socket' 32 `inf-'the end of the handle 1l.

YVhat I clain'l is A ln a Wrench, the co1nb1nat1on.\v1th a mainsto'ekand anw" auxiliary stocl{,=having oppos- Vzy -ingj aws',y of. a`snuglyitting sleeve of generous length slidable on the main stock, parallel-linl`s pivotally-connecting the two stocks in parallel felation,said lnain stoel: having a-'fseries of sockets extending along the same,a nipple on the sleeve and opening through Mthe'fwallf'ot thefsleeve toregister With said sockets, a bolt having a neck and movable in? Ithenipple 'to :engage the sockets, a5 lever pi'vt-e'd to"thesleevefandhaving `a 'forked 7 "pressed betweenithe other end of 'the vlever'saidlneck ofitheliholt, and a spring 'come' Lleverthavil'ig itsouter'tace of the .free end

